

function po(){
    let but = document.querySelector('.but');
    let but1 = document.querySelector('.but1');
    let but2 = document.querySelector('.but2'); 
    let but3 = document.querySelector('.but3');
    let but4 = document.querySelector('.but4');
    let but5 = document.querySelector('.but5');
    let t1 = document.querySelector('.t1');
    let t2 = document.querySelector('.t2');
    let t3 = document.querySelector('.t3');
    let f18 = document.querySelector('.f18');
    f18.style.display = 'none';
    but.style.display = 'none';  
    but1.style.display = 'flex'; 
    but2.style.display = 'flex';  
    but3.style.display = 'flex'; 
    but4.style.display = 'none';
    but5.style.display = 'none';
    t1.style.display = 'flex';
    t2.style.display = 'none';
    t3.style.display = 'none';
}
function po1(){
    let but = document.querySelector('.but');
    let but1 = document.querySelector('.but1');
    let but2 = document.querySelector('.but2'); 
    let but3 = document.querySelector('.but3');
    let but4 = document.querySelector('.but4');
    let but5 = document.querySelector('.but5');
    let t1 = document.querySelector('.t1');
    let t2 = document.querySelector('.t2');
    let t3 = document.querySelector('.t3');
    let f18 = document.querySelector('.f18');
    f18.style.display = 'none';
    but.style.display = 'flex'; 
    but1.style.display = 'none'; 
    but2.style.display = 'flex'; 
    but3.style.display = 'none'; 
    but4.style.display = 'flex';
    but5.style.display = 'none';
    t1.style.display = 'none';
    t2.style.display = 'flex';
    t3.style.display = 'none';
}
function po2(){
    let but = document.querySelector('.but');
    let but1 = document.querySelector('.but1');
    let but2 = document.querySelector('.but2'); 
    let but3 = document.querySelector('.but3');
    let but4 = document.querySelector('.but4');
    let but5 = document.querySelector('.but5');
    let t1 = document.querySelector('.t1');
    let t2 = document.querySelector('.t2');
    let t3 = document.querySelector('.t3');
    let f18 = document.querySelector('.f18');
    but.style.display = 'flex'; 
    but1.style.display = 'flex'; 
    but2.style.display = 'none'; 
    but3.style.display = 'none'; 
    but4.style.display = 'none';
    but5.style.display = 'flex';
    t1.style.display = 'none';
    t2.style.display = 'none';
    t3.style.display = 'flex';
    f18.style.display = 'flex';
}